Gas-turbine plant



March 24, 1931. E E 1,797,783

' GAS TURBINE PLANT FiledOct. 15, 1928- Patented. Mar. 24, 1931 UNITED STATES PATENT OFFICE LDOLF MEYER, OF KUSHAGHT, NEAR ZURICH, SWITZERLAND, ASSIGNOR '10 AKTIEN- GmEDLSCHAFT BROWN, BOVERI AND CIR, B ADEN, SWITZERLAND GAS-TURBINE PLAN'Q Application filed October 15, 1928, Serial No.

It hasalready been proposed to carry out the compression of the combustion 'air required for the operation of gas turbines in revolutions to unite the advanta two stages, the compression being effected in the first stage by a rotary compressor driven by a gas turbine, while the compression in the second stage is efiected by means of a piston compressor which is driven by a separate reciprocating internal combustion engme. a

It has also been proposed to carry out the compression in a single stage by means of a rotary compressor and to drive the. latter by means of a steam turbine, the working steam of which is produced by the exhaust gases of a gas turbine in an exhaust gas steam boiler. The first method has the disadvantage that the rotary compressor is dependent on the speed of revolution of the gas-turbine, the speed of revolution of the gas turbine being determined by the electric generator also driven b -it and amounting on the continent 0 Europe to*3,000, 1,500 ,or 1,000 r minute, corresponding to the usual perio 'city of 50 per second, while it has the advantage that the compression is unlimited. The second method has the disadvantage that the degree of the total compression is limited by the fact that the energy required for starting the compressor is determined by the quantity and temperature of the exhaust gases which generate the steam -for the driving steam turbine. This method, however, has the advantage of independence as regards the speed of revolution for driving the rotary compressor which requires a higher speed of revolution lying as a rule' far above the highest possible speed of revolution of the as turbine or the electric generator, whic amounts to 50,pe11' seeon The present invention has for its ob'ect sof both'methodsw e 312,711, and in Germany October 15, 1927.

k by the exhaust gases of the gas turbine g which is coupled to an electric generator 2, and that the final compression is effected by means of a piston compressor 0 which is driven by a separate'reciprocating internal combustionengine d. This makes it possible to select for the precompression a s eed of revolution which is suitable both or the drivpressor e, whereby in the first place both the turbine and the compressor become cheaper and in the second lace their efliciency is increased which is of decisive importance for the total efiiciency of the gas turbine process.

.-The exhaust gases of the exhaust turbine ing steam turbine f and for the rotary comwill then perform by way of the boiler and ,7

the steam turbine that portion of thecompression work which is suited to their capacity, while no limits are set to the final compression, as this is effected by the independent reciprocating internal combustion engine, the power of which is made such that the final pressure reaches the most favourable value for the power process.

'WhatIclaimis:

A gas turbine plant including a gas turbine, a separate reciprocating internal combustion engine, a rotary compressor and a piston compressor working in series for efecting the compression of air for the gas turbine in two sta es, the piston compressor being driven by t e reciprocating internal combustion engine, a steam turbine driving the rotary compressor, and a boiler for the steam turbine heated by the exhaust gas of the gas turbine.

In testimony name to this Specification. 4

' ADOLF MEYER.

avoidin their di'sa vantages. The dra T shows a5 application of the combined mom It consists in this, that the precompression is effected by a rotary compressor a which is driven by a steam-turbine? the steam of which is generated in an e 'aust' gas boiler whereof I have sighed my 

